VIRAL ANTIBODIES IN BOVINE FETUSES IN ARGENTINA

In order to establish the prevalence of viral infections of the bovine fetus in Argentina, a serological survey for antibodies against viral agents currently affecting cattle in this country was conducted. Anti bodies against foot-and-mouth disease virus (FMDV), bovine herpesvirus -1 (BHV-1), bovine leukaemia virus (BLV), bovine rotavirus (BRV), bovi ne coronavirus (BCV), bovine viral diarrhoea virus (BVDV) and parainfl uenza-3 (PI-3) were investigated in a total of 315 fetal serum samples . Conventional techniques were used: indirect immunofluorescence (FMDV , BHV-1, BVDV and BCV), radial immunodiffusion (BLV), ELISA (BRV) and haemagglutination inhibition (PI-3). Antibodies against BHV-1, BVDV an d PI-3 were detected in samples from fetuses in the second and third t rimester of gestation, with a prevalence of 1.21 per cent (two of 165) , 2.03 per cent (four of 197) and 5.08 per cent (nine of 177), respect ively. Either antibodies or non-antibody factors able to bind to BRV a nd BCV antigens were detected with a prevalence of 2.44 per cent (five of 205) and 4.54 per cent (five of 110), respectively. In addition, 1 4.68 per cent of non-specific inhibitors of PI-3 mediated haemagglutin ation were found. No seropositives against. FMDV and BLV were detected .